Caster



(Model.) l

S. M'. MICHELSON.

GASTER.` Y No. 322,308.- Patented July` 14, 1885.

' i UNITED STATES PATENT OEEICE.`

SIGISMUND M. MICHELSON, OF MILWAUKEE, VISCONSIN.

CASTER.

SPECIFICAIO forming part of Letters Patent No. 322,308, dated July 14,1885.

Application tiled March 30, 1885. (Model.)

To all whom it may concer-n.; Be it known that l, SIGIsMUND M. MICHEL-soN, of Milwaukee, in the county of Milwaukee, and in the State ofWisconsin, have invented certain new and useful Improvements in Casters;and I do hereby declare that the following is a full, clear, and exactdescription thereof.

My invention relates to casters for trunks and other articles offurniture; and it consists in certain peculiarities of construction, aswill be fully set forth hereinafter.

In the drawings, Figure 1 is a perspective View of my improved deviceinverted. Fig. 2 is a like view of the cup or shell. Fig. Sis a similarView with the protecting-plate removed. Fig. 4 is a perspective view ofmy device with the cup or shell removed. Fig.

5 is a perspective view of the protecting-plate. Fig. 6 is an invertedperspective view of the roller-bearings. Fig. 7 is a vertical section ofmy device, and Fig. 8 is a perspective View of my device in position foruse.

My present invention is, in part, an improvement on the caster patentedto me on the 3d day of March, 1885, and numbered 313, 097, its chiefadvantage consisting in the addition of the device for decreasingfriction, as well as in some slight structural points of improvementwhereby the cost of manufactu re is decreased and greater efciencysecured.

A represents the shell of well77 or my device, and in the formillustrated has two arms or lugs, A', to assist in attaching the shellto the under side of trunks or other flat-bottomed articles offurniture. The top plate of the shell A is marked a, and from its centerthere projects downward a vertically perforated axle, a'. A

D is the revolving protecting plate of my device, and has a centralperforation, d, to receive the end of the bolt or pivot E after the samehas passed through the vertical perforation in the axle a', and is cutaway at one side, as at di; and on either side of this cut-away portionare depending lugs or bearings D' D', hollowed out on their uppersurfaces, as at d' d', to receive the journal f of the roller F.

G is a sleeve or hub, which encircles the aXle a' of the shell A, andwhich is formed with a bifurcated extension, the arms g g of whichstraddle the roller F, and which arms have downwardextending projectionsg' g' at or near their ends, which iit into the depressions d' d' in thebearings D' D', and which are centrally notched, as at g2 g2, so as torest on the ends of the rollerjournal f when the parts have all been puttogether, as shown in Fig. 7.

Bis a journal which extends from the lower part of the sleeve or lug 'Gto a bridge, g3, which connects on top the extreme ends of the two armsg g, and on this journal B is mounted an anti-friction roller, C, thespace between the arms g g being partly filled up, as shown at g4 inFig. 7, so that the'anti-friction roller, 65

while, left free to revolve on its journal, is kept in place thereonbetween this part g* and the bridge'gs, and'wholly hidden from sight,being inclosed within theA shell A. Vhen these parts have all been puttogether, as shown in Fig. 7, the projecting end of the bolt or pivot Eis upset in any suitable manner, thereby securing" all parts of myimproved device iirmly together in proper operative position. j

While I have shown the arms or lugs A' as a convenient means of securingmy casters to trunks, o., it is obvious that they may be sel cured inany other manner desired, and that the shell A may be cast with thecorner-iron of a trunk, as in my Patent No. 280,061, or with anupward-extending cup-flange for receiving the legs of articles offurniture, as shown in my Patent N 0. 313,097, or varied in an infinitevariety yof ways, this having no bearing on the essential features of mypresent invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a revolving caster, the combination of an inclosing-shell with arevolving perforated protecting-plate pivoted thereto, and arollerbearing frame revolving on a central vertical axle within saidshell, the pivot of said plate passing through said axle, and saidframecarrying the caster-roller, which projects down- Ico withthe shellA and the roller-bearing frame G g g g3, of the journal B,Vandanti-friction roller C, and the easter-roller F, mounted on a journalsecured to the frame G, substantially as set forth.

3. In a revolving easter, the combination of the shell A, with axle a,perforated protecting-plate D, with bearings D D", hollowed out, as at dd, on their upper surfaces, journal f, roller F, roller-bearing framehaving sleeve G, and arins g g, with notched projeotions g g2, restingon the journal f, Within the hearings D D', and carrying ananti-friction roller bearing against the under side of the top plate ofthe shell, and the pivot E, substantially as set forth.

4. In a revolving caster, the combination of an inclosing-shell with arigid central vertical axle, a roller-bearing frame having. avertically-perforated hub revolving on said rigid vertical axle carryinga roller projecting beneath said shell, with an anti-friction rollerjournaled in said frame above the journal of the caster-roller, andbearing upon the under surface of the top plate of said shell, the axleof the anti-friction roller being independent of the central axle of thedevice, and the roller-frame revolving around a fixed axis,substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in the County of Milwaukee and State of ViS- consin, in thepresence of two Witnesses.

SIG-ISMUND M. MICHELSON- Y Vitnesses:

H. G. UNDnRWooD, H. J. FoRsYTHE.

